초록 ▼

A monolithic integrated complementary metal oxide semiconductor (CMOS) circuit senses internal junction temperature and converts it to a binary coded decimal output signal. The circuit compares a temperature dependent junction voltage with a bandgap reference voltage controlled by a very stable ampl

A monolithic integrated complementary metal oxide semiconductor (CMOS) circuit senses internal junction temperature and converts it to a binary coded decimal output signal. The circuit compares a temperature dependent junction voltage with a bandgap reference voltage controlled by a very stable amplifier. The comparison differential is then converted to a binary coded decimal output signal by an analog to digital converter. The circuit utilizes parasitic bipolar NPN transistor elements formed from a substrate of the chip in a conventional CMOS fabrication process. The principles of the present invention are also broadly applicable to other semiconductor technologies such as integrated injection logic (I2L).

대표청구항 ▼

A single low power monolithic silicon chip integrated circuit for continuously sensing temperature phenomena and for providing a digital output corresponding to sensed temperature, said circuit including in electrical interconnection: temperature sensor transistor means in said chip for providing an

A single low power monolithic silicon chip integrated circuit for continuously sensing temperature phenomena and for providing a digital output corresponding to sensed temperature, said circuit including in electrical interconnection: temperature sensor transistor means in said chip for providing an output voltage which varies with the temperature of said chip at the region of said sensor transistor means, bandgap voltage reference means in said chip for providing a known, stable reference voltage which is substantially independent of the temperature of said chip, analog to digital converter means in said chip for comparing said output voltage and said reference voltage and deriving from the comparison thereof said digital output corresponding to said sensed temperature.